BSM
insider transactionsBlack Stone Minerals, L.P. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Cluster buy signal: Multiple insiders at the same company buying around the same time — often a stronger signal than a single buy. 2 different insiders made open-market purchases in the last 90 days, totalling $2.4M.
Net shares · 90d
+80.0K
179.3K buy · 99.3K sell
Net value · 90d
$1.0M
$2.4M in · $1.4M out
Sentiment · 90d
Net buying
63% buying · 37% selling
Open-market trades · 90d
11
179.3K buy · 99.3K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Buy·P
Director
$495.3K
36.4K sh · $13.62
Own +6%
-
Buy·P
Director
$490.0K
36.4K sh · $13.48
Own +7%
-
Buy·P
Director
$497.3K
37.6K sh · $13.21
Own +10%
-
Buy·P
Executive Chairman
$15.1K
1.1K sh · $13.50
Own +0%
-
Buy·P
Executive Chairman
$258.1K
19.2K sh · $13.48
Own +1%
-
Sell·S
Director
$149.7K
11.1K sh · $13.45
Own -7%
-
Buy·P
Executive Chairman
$336.9K
25.0K sh · $13.47
Own +1%
-
Buy·P
Executive Chairman
$314.4K
23.6K sh · $13.32
Own +1%
-
Sell·S
SVP, General Counsel, and Sec · 10b5-1
$404.0K
29.4K sh · $13.75
Own -4%
-
Sell·S
SVP, General Counsel, and Sec · 10b5-1
$424.7K
29.4K sh · $14.45
Own -4%
-
Sell·S
SVP, General Counsel, and Sec
$424.7K
29.4K sh · $14.45
Own -4%
-
Grant·A
Director
$7.2K
473 sh · $15.12
Own +7%
-
Grant·A
Director
$22.5K
1.5K sh · $15.12
Own +1%
-
Grant·A
Director
$23.7K
1.6K sh · $15.12
Own +0%
-
Grant·A
Director
$18.7K
1.2K sh · $15.12
Own +0%
-
Grant·A
Director
$18.7K
1.2K sh · $15.12
Own +0%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 1, 2026 | Mark D Dewalch | Buy P | 36.4K | $495.3K |
| May 29, 2026 | Mark D Dewalch | Buy P | 36.4K | $490.0K |
| May 28, 2026 | Mark D Dewalch | Buy P | 37.6K | $497.3K |
| May 13, 2026 | Thomas L Carter Jr KEY | Buy P | 1.1K | $15.1K |
| May 12, 2026 | Thomas L Carter Jr KEY | Buy P | 19.2K | $258.1K |
| May 12, 2026 | Ashley J Longmaid | Sell S | 11.1K | $149.7K |
| May 11, 2026 | Thomas L Carter Jr KEY | Buy P | 25.0K | $336.9K |
| May 8, 2026 | Thomas L Carter Jr KEY | Buy P | 23.6K | $314.4K |
| May 5, 2026 | Luke Stevens Putman 10b5-1 | Sell S | 29.4K | $404.0K |
| Apr 6, 2026 | Luke Stevens Putman 10b5-1 | Sell S | 29.4K | $424.7K |
| Apr 6, 2026 | Luke Stevens Putman | Sell S | 29.4K | $424.7K |
| Apr 2, 2026 | Anne Lenoir Hamman | Grant A | 473 | $7.2K |
| Apr 2, 2026 | William E. Randall | Grant A | 1.5K | $22.5K |
| Apr 2, 2026 | Alexander D. Stuart | Grant A | 1.6K | $23.7K |
| Apr 2, 2026 | Mark D Dewalch | Grant A | 1.2K | $18.7K |
| Apr 2, 2026 | Jerry V. Kyle Jr. | Grant A | 1.2K | $18.7K |
About BSM insider trading
This page tracks insider transactions for Black Stone Minerals, L.P. (BSM) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.